Mechanical movement



Cet. 28, 1930. w. EN|cKERsoN MECHANICAL MOVEMENT Filed Sept. Al2, 1927 Patented Oct. 28, 193()y i narran stares PATENT oFFicE g WILLIAM NICKERSON, OFBSTO1\T, MASSACHUSETTS, ASSILGNOR'TO GILLETTE.

SAFETY RAZOR COMPANY,4 OFBOSTON,

WARE f MASSACHUSETTS, A CORPORATIGNOF DELA- ivincHAnrcaL MOVEMENT .Application filed September 12, 192'?.v Serial No. 218,92; l

This invention relates to mechanical move.

' ments and more particularly to mechanism l in clamping a position, due partly to the continual reversalV wherein a variable throw crank is used in producing vibrating motionr of varying amplitudes. Y j i My invention contemplates the provision of mechanism including a crank member having a crank pin which may be conveniently adjusted thereon in a curved path above a center eccentric to that of the crank member. Such construction facilitates positive and accurate adjustment and setting of the crank pin. It may be used equally well in horizon tal orvertical position. It involves no problems oflubrication and is simple and inexpensive to produce and reliable in operation. Difficulty has beenexperienced heretofore the crank pin firmly in adjusted of stress upon it in use. With these conditionsin View an important feature of the present invention consists in a crank pin mounted in an eccentric adjusting disk which may be turned to adjust the positionof v the crank pin and which is provided with clamping means racting on the opposite sides thereof to hold the disk by edge engagement when the adjustmentof the crank pin has been effected.

justed position.

Figa is a sectonal view on the line 4 4 of rig. ima

Fig. 5 is a similar view of a modified conf struction.

A suitable standard or support 1 carries a bearing 2 for a shaft S-.which may be leither a driving or adriven shaft. A crank member herein shown asa crank disk is secured to one end of the shaft 3. An adjusting disk 5 is mounted on the crank disk t by means of a central screw 6 and two screws 12 and 13 which engage its edge. As herein'shown the vadjusting disk 5 is smaller than the .crank disk l and mounted with its center of rotation otfset with respect to the center of the crank disk 4l and the axis of the shaft 3. Al

crank pin 7 is carried bythe adjustingdisk 5 having a reduced portion 8 'terminating-in the shoulder 9which engages the face of the disk. The reduced portion 8 extends through the disk 5 and is riveted onthe innerlside as l shown at 10.

The adjusting cured in any position'of adjustmentupon the crank disk il. To this end `its outer. edge is disk 5 is adapted to. be sei bevelled and adapted to be engaged l'by the' tapering surfaces of the heads of the screws 12 and 13. l,When it is desired to adjust the position of the crank pin 7 thethree screws 6, 12 andV 13 are loosened and the adjusting disk 5 turned, carrying the crank pin in a curved path to a point at the desired distance from the axis of the crank disk. The adjustf ing disk 5 is then rlocked in position by set ting up the threescrews mentioned.

lt will be noted that the Vscrews 12 and 13 constituting the clamping nieansact upon the disc 5st points upon its periphery, these V are consequentlymore remote from the axis of the disc than the crank pin 7. The clamping c action of the screws, therefore7 is maximum in its effect upon the .disc and in offsetting the thrust upon the crank Ypin.` As herein shown 'the offset distance between the centers of the two disks is the same asthe radius ofthe crank pin 7 with respect to the* Aadjusting' disk 5. This construction rendersV itpossible to vary the effective position of the crank pin from one in which it coincides withy theA axis of the crank Ydisk e, and in which its 4motion Vis consequently zero, to va positionA Y 'in which its distance from the center of rota;

tion is double'the length of its radius in theV adjusting disk and in which its throwis a* maximum. By increasing the /diameteraof the adjusting .disk 5 the range of adjustmentV of theV crank? pin 7 be extended within. the limits of the crank disk. p -v j A second standard 15 is .shown upon which is mounted a bell crank lever. 16,1onearm ofV which is connected to the crank pin 7 through a link 11. The other arm of the lever 16 is connected to a second link 17 for oscillating any desired part of a machine in a pre-determined path of adjustable amplitude.

An index mark may be provided upon the crank disk 4 to cooperate with a scale on the adjusting disk 5 or vice versa whereby any desired adjustment of the disk may be accurately made and quickly reproduced.

In Fig. 5 there is illustrated alternative means for holding the adjusting disk 5 in position on the crank disk 4. Thiscomprises an annular ring 14 having a bevelled inner surface complementary to the periphery of the adjustingdisk 5 and suitable means such as screws for locking the ring upon the periphery of the adjusting disk. This modified holding means might be used to advantage where the transmission of considerable power is contemplated.

Having thus described my invention, I claim:

1. Mechanism comprising a shaft, a crank disc mounted thereon, a second disc member rotatably mounted on said first disc and having its center of rotation spaced from the axis of said shaft, and a crank pin on said second disc at a distance from its center substantially the same as the distance between the axis of said shaft and the center of rotation of said second disc, the periphery of said second disc being outwardly bevelled and extending beyond the crank pin, an annular ring having its inside edge bevelled to correspond to the bevel of said second disc, and means to clamp said ring to the first named disc, whereby it will engage said second named disc in a location further from the axis of the disc than the crank pin and retain the disc in any desired relatively rotated position to determine the throwL of the crank pin.

2. Mechanism comprising a shaft, a crank disc mounted thereon, a disc rotatably mounted on the crank disc by a screw extending through the second disc into the first mentioned disc at a point spaced from the axis of said shaft, a crank pin mounted in said Second disc at a point spaced from its center a. distance substantially the same as the distance between the axis of said shaft and the center of rotation of said second disc, said second disc havingl its edge bevelled outwardly toward the first disc, and an annular ring having a complementary bevel adapted to engage the bevelled edge of the second disc in a location more remote from its axis than the crunk pin, and screws to fasten said ring to the first disc, whereby said crank pin may be retained at any desired distance from the center of said shaft fromaero to twice the dis-r tance between the centers of the two discs.

3. Adjustable crank pin mechanism comprising a crank disk, an eccentric disc mounted upon the'surface thereof and having a crank pin which projects outwardly therefrom at a point within its periphery, and clamping means coextensive wi th the periphery of said eccentric disk and acting to hold the latter by edge engagement in any adjusted positionV thereof.

4. Adjustable crank pin mechanism comprising a crank disk, an eccentric adjusting disk mounted upon the surface thereof, having a bevelled periphery and carryilngl a crank pin at a point within its periphery, and clamping means located outside its periphery and acting at opposite sides of said eccentric disk outside the crank pin and upon the bevelled periphery thereof to hold said disk by edge engagement in any desired position of adj ustment.

rSigned at Boston, Massachusetts, this seventh day of September, 1927.

VILLIAM EMERY NICKERSON. 

